MNX10010 / Rev B
4/11/2008
3
The ‘BATT TEST’ switch momentarily connects the meter directly across the
battery terminals when depressed, to allow the user to check the actual battery
voltage during operation. This procedure will not disturb the test in progress.
The dynamic signal from the sensor is superimposed upon the bias voltage and
appears at the “Sensor’ jack. This signal is de-coupled from the DC bias by the
10µf coupling capacitor and connected to the ‘Output’ jack.
It can be seen, by examination of Figure. 1, that the dynamic signal may also be
read by coupling to the ‘Sensor’ jack as well. However, if this is attempted, a
means of dealing with the +10 Volt DC offset must be considered.
This type of connection can be useful when it is desirable to direct couple the
readout to the sensor rather than to AC couple. More on this topic later.
1 MEG
1 MEG
10
µ
F
10
µ
F
OUTPUT
CHAN1
SENSOR
CHAN1
SENSOR
CHAN2
OUTPUT
CHAN2
SENSOR
CHAN3
OUTPUT
CHAN3
OFF
CH1
CH2
CH3
S1-B
+
FRONTPANEL
ROTARYSWITCH
10
µ
F
2 mA CC
DIODE
2 mA CC
DIODE
2 mA CC
DIODE
+ 18VOLTS
1 MEG
OFF
MONITOR
VOLTMETER
BATTTEST
PUSHBUTTON
Figure 1. Schematic Diagram, PS03
